3 X 70-200mm Lenses

Hi, I have 3 lenses here
.
1 SMC Pentax-A 80-200mm f4.7-5.6 and
1 Pentax-F Zoom 70-200mm f4-5.6 and
1 Sigma Zoom 70mm-210mm f4-5.6 UC II

I compared the 3 lenses for sharpness and found the Pentax-A to be the sharpest.
The other 2 are less sharp and both are about the same.

The settings where all the same.
200mm f5.6 Flash with 1/180sec.

The Pentax-A lens is of course manual focusing only. and the lightest of the 3 lenses.
The Pentax zoom 70-200mm is the heaviest and a real monster.

Did any of you have any experience with any of the above lenses?

Regards, Horst